package com.sky.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.collection.CollUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;

import java.util.stream.Collectors;

/**
 * @author Lenovo
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;
    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO) {
        //获取地址id
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        //根据地址id查询地址
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        //判断地址是否为空
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        checkOutOfRange(addressBook.getCityName()+ addressBook.getDistrictName()+ addressBook.getDetail());
        //获取下单用户id
        Long userId = BaseContext.getCurrentId();
        //根据用户id查询购物车数据
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (CollUtil.isEmpty(shoppingCartList)) {
            throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表中插入数据
        Orders orders = new Orders();
        BeanUtil.copyProperties(ordersSubmitDTO, orders);
        //下单用户id
        orders.setUserId(userId);
        //手机号
        orders.setPhone(addressBook.getPhone());
        //地址
        orders.setAddress(addressBook.getDetail());
        //下单时间
        orders.setOrderTime(LocalDateTime.now());
        //支付状态
        orders.setPayStatus(Orders.UN_PAID);
        //订单状态
        orders.setStatus(Orders.PENDING_PAYMENT);
        //订单号(获取当前系统时间的毫秒数并转换为字符串)
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        //收货人
        orders.setConsignee(addressBook.getConsignee());
        //封装订单数据
        orderMapper.insert(orders);
        //获取购物车数据

        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            //创建订单明细对象
            OrderDetail orderDetail = new OrderDetail();
            BeanUtil.copyProperties(cart, orderDetail);
            //订单id
            orderDetail.setOrderId(orders.getId());

            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        //清空购物车数据
        shoppingCartMapper.deleteBatch(userId);
        return OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 历史订单查询
     *
     * @return
     */
    @Override
    @Transactional
    public PageResult getHistoryOrders(int pageNum, int pageSize, Integer status) {
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> page = orderMapper.getHistoryOrders(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList<>();
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.listByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtil.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);
            }
        }
        assert page != null;
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO selectOrderDetailById(Long id) {
        Orders orders = orderMapper.selectOrderDetailById(id);
        OrderVO orderVO = new OrderVO();
        if (orders != null) {
            BeanUtil.copyProperties(orders, orderVO);
            //根据订单id查询订单详情
            List<OrderDetail> orderDetailList = orderDetailMapper.listByOrderId(orders.getId());
            orderVO.setOrderDetailList(orderDetailList);
        }
        return orderVO;
    }

    /**
     * 取消订单
     *
     * @param id
     */
    @Override
    public void cancel(Long id) {
//根据id查询订单
        Orders orders = orderMapper.selectOrderDetailById(id);

        // 校验订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        // 校验订单是否可取消
        if (orders.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //待接单状态设置退款
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            orders.setPayStatus(Orders.REFUND);
        }
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        //修改订单状态
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    @Override
    public void repetition(Long id) {
        // 查询当前订单
        Orders orders = orderMapper.selectOrderDetailById(id);
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        // 查询当前订单对应的购物车数据
        List<OrderDetail> orderDetailList = orderDetailMapper.listByOrderId(id);
        if (CollUtil.isNotEmpty(orderDetailList)) {
            for (OrderDetail orderDetail : orderDetailList) {
                ShoppingCart shoppingCart = new ShoppingCart();
                BeanUtil.copyProperties(orderDetail, shoppingCart);
                shoppingCart.setUserId(BaseContext.getCurrentId());
                shoppingCart.setCreateTime(LocalDateTime.now());
                shoppingCartMapper.insert(shoppingCart);
            }
        }
    }

    /**
     * 客户端查看订单列表
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult selectOrder(OrdersPageQueryDTO ordersPageQueryDTO) {
//开启分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        //根据订单号和手机号搜索
        Page<Orders> page = orderMapper.selectOrder(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList<>();
        //判断订单是否为空
        if(page == null ){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                //获取订单id
                Long orderId = orders.getId();
                //获取订单详情
                List<OrderDetail> orderDetailList = orderDetailMapper.listByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtil.copyProperties(orders, orderVO);
                orderVO.setOrderDishes(getOrderDishesStr(orders));
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 订单统计
     *
     * @return
     */
    @Override
    public OrderStatisticsVO getOrderStatistics() {
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        //根据订单状态分类计数
        orderStatisticsVO.setToBeConfirmed(orderMapper.countStatus(Orders.TO_BE_CONFIRMED));
        orderStatisticsVO.setConfirmed(orderMapper.countStatus(Orders.CONFIRMED));
        orderStatisticsVO.setDeliveryInProgress(orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS));
        return orderStatisticsVO;
    }

    /**
     * 接单订单
     *
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = new Orders();
        //根据id查询订单
        orders = orderMapper.selectOrderDetailById(ordersConfirmDTO.getId());
        orders.setStatus(Orders.CONFIRMED);
        //更新数据库
        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders orders = orderMapper.selectOrderDetailById(ordersRejectionDTO.getId());
        // 订单只有存在且状态为2（待接单）才可以拒单
        if (orders == null || !orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //TODO 如果付款需要退款
        orders.setPayStatus(Orders.REFUND);
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelReason("商家拒单");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 管理端取消订单
     *
     * @param ordersCancelDTO
     */
    @Override
    public void adminCancel(OrdersCancelDTO ordersCancelDTO) {
        //根据id查询订单
        Orders orders = orderMapper.selectOrderDetailById(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        //TODO 如果付款需要退款
        orders.setPayStatus(Orders.REFUND);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    @Override
    public void delivery(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.selectOrderDetailById(id);
        //订单只有存在且状态为3（已接单）才可以派送
        if (orders == null || !orders.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    @Override
    public void complete(Long id) {
//根据id查询订单
        Orders ordersDB = orderMapper.selectOrderDetailById(id);
        //订单只有存在且状态为4（派送中）才可以完成
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.selectOrderDetailById(id);
    }


    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.listByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }


    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
}
